We should de-account dirty counters for page when redirty in ->writepage(). Wu Fengguang described in 'commit 971767caf632190f77a40b4011c19948232eed75': "writeback: fix dirtied pages accounting on redirty De-account the accumulative dirty counters on page redirty. Page redirties (very common in ext4) will introduce mismatch between counters (a) and (b) a) NR_DIRTIED, BDI_DIRTIED, tsk->nr_dirtied b) NR_WRITTEN, BDI_WRITTEN This will introduce systematic errors in balanced_rate and result in dirty page position errors (ie. the dirty pages are no longer balanced around the global/bdi setpoints)." Signed-off-by: Chao Yu <chao2.yu@xxxxxxxxxxx> --- fs/f2fs/checkpoint.c | 1 + fs/f2fs/data.c | 1 + fs/f2fs/node.c | 1 + 3 files changed, 3 insertions(+) diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index c8516ee..f069249 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -178,6 +178,7 @@ no_write: redirty_out: dec_page_count(sbi, F2FS_DIRTY_META); wbc->pages_skipped++; + account_page_redirty(page); set_page_dirty(page); return AOP_WRITEPAGE_ACTIVATE; } diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 93d80ea..101b4cd 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -839,6 +839,7 @@ out: redirty_out: wbc->pages_skipped++; + account_page_redirty(page); set_page_dirty(page); return AOP_WRITEPAGE_ACTIVATE; } diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 1f9cf21..8c14110 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -1193,6 +1193,7 @@ static int f2fs_write_node_page(struct page *page, redirty_out: dec_page_count(sbi, F2FS_DIRTY_NODES); wbc->pages_skipped++; + account_page_redirty(page); set_page_dirty(page); return AOP_WRITEPAGE_ACTIVATE; } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
